Geeti Mahajan, M.D.
NPI 1538320510ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Brooklyn, NY
Internal Medicine, Endocrinology, Diabetes & Metabolism (M.D.) with Maimonides Faculty Practice Plan and 1 other group, practicing in Brooklyn, New York. Their prescriptions cost Medicare Part D more than their services did: $309,152 for 884 claims, against $19,536 paid for services in 2024. Ascendis Pharma Endocrinology Inc reported $148.21 in payments in 2025, mostly food and beverage. Lists Maimonides Medical Center as a hospital affiliation.
Overview
| NPI | 1538320510 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 22, 2008 |
| Last updated in NPPES | Feb 4, 2026 |
| Certified by provider | Feb 4, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | 309583 | NY |
| Internal Medicine, Endocrinology, Diabetes & Metabolism | 207RE0101X | 25MA10543800 | NJ |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Endocrinology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 110 |
|---|---|
| Services billed | 212 across 11 procedure codes |
| Paid by Medicare | $19,536 |
Part D prescriptions in 2024
| Prescriptions (claims) | 884 · 1,500 30-day fills |
|---|---|
| Patients | 132 |
| Total drug cost | $309,152 |
| Generic share | 49% of claims |
Education and affiliations
| Graduation year | 2006 |
|---|---|
| Medicare specialty | Endocrinology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Maimonides Faculty Practice PlanBrooklyn, NY · 252 clinicians
- Maimonides Medical Center - Division of Endocrinology FppBrooklyn, NY · 11 clinicians
Hospital affiliation
- Maimonides Medical CenterBrooklyn, NY
Industry payments (Open Payments)
- 2025$148.21 · 1 payment from 1 company
- 2024$188.38 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ascendis Pharma Endocrinology Inc | $148.21 | 1 |
What the 2025 payments were for
- Food and Beverage$148.21 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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